分类 行为动词、情态动词、系动词、助动词
有很多单词
play ,can ,sound ,do ,study ,will,seem ,must ,shall,be ,listen ,taste ,may ,have ,sleep ,need,sent,grow ,open ,dare ,smell ,work ,turn ,finish,ought to,become,join,could,close,look,borrow,might,arrive,feel,make,